Fiancé left for basic training....need support

Hello, this is a little hard to write but today is my second day without my fiancé since he left for basic training and I feel very very sad. I’m reaching out to this group to see if anyone who ha been through the same experience can become kind of my friend/support buddy as none of my friends get this feeling. A little but of a back story I have Been living with my fiancé for a year and I’m used to doing and being around him all the time. 3 months ago we decided that he should join the army (as he had been wanting to since he was 15). So now that i have to go for the next few months without him I don’t know what to do. I know I have to keep myself busy but right now I can’t find the energy nor desire to do anything else besides staying in bed. I hate feeling like this.